package com.ljy.rpc.provider.server;

import com.ljy.rpc.provider.handler.RpcServerHandler;
import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.string.StringDecoder;
import io.netty.handler.codec.string.StringEncoder;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * 启动类
 */
@Service
public class RpcServer implements DisposableBean {

    private NioEventLoopGroup bossGroup;

    private NioEventLoopGroup workGroup;

    @Autowired
    RpcServerHandler rpcServerHandler;

    public void startServer(String ip, int port) {

        try {
            //1.创建线程组
            bossGroup  = new NioEventLoopGroup(1);
            workGroup  = new NioEventLoopGroup();
            //2.创建服务端启动助手
            ServerBootstrap serverBootstrap = new ServerBootstrap();
            //3.设置参数
            serverBootstrap.group(bossGroup, workGroup)
                    .channel(NioServerSocketChannel.class)
                    .childHandler(new ChannelInitializer<SocketChannel>() {

                        @Override
                        protected void initChannel(SocketChannel sc) throws Exception {
                            ChannelPipeline pipeline = sc.pipeline();
                            //添加String的编解码器
                            pipeline.addLast(new StringDecoder());
                            pipeline.addLast(new StringEncoder());
                            //业务处理类
                            pipeline.addLast(rpcServerHandler);
                        }
                    });
            //4.绑定端口
            ChannelFuture future = serverBootstrap.bind(ip, port).sync();
            System.out.println("--------服务端启动成功------------");
            //将异步改为同步
            future.channel().closeFuture().sync();
        }catch (InterruptedException e) {
            e.printStackTrace();
        }finally {
            bossGroup.shutdownGracefully();
            workGroup.shutdownGracefully();
        }

    }

    @Override
    public void destroy() throws Exception {
        if (bossGroup != null) {
            bossGroup.shutdownGracefully();
        }
        if(workGroup != null) {
            workGroup.shutdownGracefully();
        }
    }
}
